Keyboard



FIG. 1 is a front top and side perspective view of a keyboard showing our new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a side elevational view thereof;

FIG. 4 is a side elevational view thereof opposite that shown in FIG. 3;

FIG. 5 is a rear elevational view thereof; and,

FIG. 6 is a top plan view thereof. 

The ornamental design for a keyboard, as shown and described. 